JPH09156658A - Food packaging can - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a safe and hygienic food-stuffing can provided with a vacuum sealing device such as an easily detachable and unbendable metallic cap, which is formed to seal the can with the cap owing to the vacuum action. SOLUTION: A cord 2 wound up outward at the upper end of the cylindrical can body 1 is arranged. A contracted part remarkably lessened in the diameter is formed at the upper end of the cylindrical body where the cord 2 wound up outward is arranged. And the part is tilted inward so that the outer edge of the side of cord is vertically flush with the external face of the side wall of the cylindrical body of the can. The inside face of the flange or the skirt 6 of the easily detachably and metallic cap is retained in a contact state with the external face of the side wall of the cylindrical body, when the cap is held in the closed state. The can is sealed by the easily detachable metallic cap provided with an unbendable seal gasket 5.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to vacuum sealing with an easily foldable metal lid that can be easily removed and without the use of mechanical sealing means such as screws, nippers, screws and the like. The present invention relates to a food-stuffed can equipped with an effective means capable of

The present invention is used for packing preserved foods and other foods, and is easily removed from three pieces: a cylindrical body joined by bending, a lid and a bottom. To provide a tin-plated sheet can formed by any suitable efficient device for receiving a metal lid capable of sealing without the use of folding or other mechanical devices, i.e. It is simply carried out by the action of a vacuum, the vacuum being applied to the inside of the can by the physical vacuum obtained during cooking or sterilization of the product in a water bath during the manufacture of the product or by the mechanical vacuum in the case of dry product It is formed.

[0003]

2. Description of the Prior Art In order to facilitate understanding of the present invention, an easily removable lid described in US Pat. No. 5,275,679 issued Jan. 4, 1994 to the present inventor. The can equipped with will be described. This can is particularly useful for sealing cups and other glass stuffing instead of a folding closure system.

Such an easily removable metal lid disclosed therein has a circular groove provided with a lower flange or skirt and having a sealing gasket formed from a resin material (plastisol) adjacent the inner surface. It is formed by a circular panel having a recessed area in the center and an escape hole in the center. This panel is secured by a removable seal made from the same resin material as the gasket, which seal
When removed to open the pack, the vacuum created inside the pack is released, thus allowing the person trying to open the can to open the cover without the use of tools.

In order that these easily removable metal lids can be used with the same advantages as when opening the can, a new process for the production of such cans has been developed which, according to the method, By equipping it with a good means to receive the metal lid that can be removed safely and securely, the mouth of the can can be appropriately configured, and the metal packing body can be completely protected from the oxidizing action. Therefore, the integrity of the product can be secured. Furthermore, if the metal stuffing body is invisible, by removing the sealing plug of the escape hole, the lid is loosened at the mouth of the can, and it is possible to quickly know whether the can is good or bad. Therefore, this lid can be used for glass cups, since the consumer can reject the jammer.

This new process does not create a factor which causes an oxidative effect inside the can or causes incomplete protection by the sanitary varnish covering the inner surface of the can, and yet the inner surface of the can which is coated with lithographic paint. Of the paint, and thus the transfer of paint toxicity, and yet the novel construction of this new method does not form sharp burrs, and thus the handling or opening of packings The user's hand is not damaged during the operation.

Thus, a particular technique for forming the mouth of a can has been developed, which according to the technique has an internally wound cord on the top of a cylindrical body,
This upper part, which is formed with such outwardly wound cords, has a diameter due to contraction so that the side and outer sides of the cords are kept on the same vertical line as the sides and outer wall of the cylindrical body of the can. When the lid is applied to this cord significantly reduced and yet to close the can, the flange or skirt of the lid is held in contact with the side wall of the cylindrical body of the can, thus this flange or skirt. Having an undesired distance or spacing from the cylindrical body of causes the lid to pop up due to shaking when packing, transferring, or improperly handling the packing, We try to prevent unexpected pop-outs of the contents.

It has hitherto been possible to use this easily removable metal lid which seals the can only by the action of a vacuum as the sole holding means of the lid, while retaining the advantages of the known device. It is absolutely safe in preventing the damage to the user's hand that normally occurs on most of the metal jammers during actual use. The conventional metallic packing has a sharp burr at the cut end of the can when the user opens it. If a lid is to be reused, a complementary lid, usually made of plastic material, may be needed, but previous closures have provided hygiene to protect the rest of the product. Given that we are not aware of reusing the lid to reapply it as an optional element, such inconvenience can be eliminated by using this easily removable metallic lid. it can. This is because the lid, once opened, can be reused in its perfect condition to fit snugly into the mouth of the can and provide hygienic protection.

[0009]

As mentioned above, this easily removable metallic lid does not form part of the present invention and may be better understood. It is explained as follows. The present invention
By this new method, the can is equipped with an effective and suitable means for receiving this easily removable lid, the closure of which is effected solely by the action of the vacuum formed inside the packing body. No other mechanical means are required to close the lid and maintain hermeticity.

[0010]

SUMMARY OF THE INVENTION According to the present invention, a can closure having a removable can end is formed from a tinned sheet and formed from a cylindrical body and a bottom wall attached by bending. An easily removable metal lid that is formed into a shape that receives an easily removable metallic lid that has an escape hole and that is closed by the action of a vacuum by the lid. Food canisters are provided with a closure device. According to the present invention, the cord wound up outward is arranged on the upper end of the cylindrical main body of the can, and the diameter is remarkably reduced at the upper end of the cylindrical main body where the cord wound up outward is arranged. It is characterized in that a contraction portion is formed and the portion is inclined inward so that the lateral outer edge portion of the cord is vertically aligned with the outer surface of the side wall of the cylindrical main body of the can. It has a configuration.

In a preferred embodiment of the invention, the easily removable metal lid flange or skirt has the inside surface of the flange or skirt of the cylindrical body of the can when placed and held closed. It is adapted to be held in contact with the outer surface of the side wall.

Also, in a preferred embodiment of the present invention, the closure of a tin-plated sheet can formed by a cylindrical body whose bottom end is conventionally closed by a bottom wall attached by folding is folded. It is provided by an easily removable metallic lid provided with a non-bendable sealing gasket, the holding and gas tightness of which is arranged to be provided by the action of a vacuum formed inside the can.

According to the present invention having the above-mentioned structure, the contents of the packing material can be maintained by keeping the cost of the packing body as it is, by completely airtight and safe operation so as to prevent the intrusion of foreign matter, or by preventing the transfer of oxidation and toxicity. It is possible to completely secure the integrity of the object. Furthermore, according to the present invention, it is possible to provide safety in which damage to the hand of a worker who operates or handles the packing body is completely prevented, and even after being opened at the time of first use. Same metal lid,
It can be reused in its complete condition as a hygienic lid to protect its contents and can be reused repeatedly.

[0014]

DETAILED DESCRIPTION OF THE INVENTION The manufacture of a foodstuffing can with vacuum closure means with a non-foldable metal lid that can be easily removed will now be described with reference to the accompanying drawings.

In a novel method of making a food stuffing can with an effective vacuum means, which is closed by a non-foldable metal lid that can be easily removed, as will be explained in more detail below with reference to the accompanying drawings. Is a cylinder with a ferrule of circular cross section, closed at the bottom by a bottom end (not shown) that is usually formed from a tin-plated sheet and is usually attached by bending (not shown). The upper part of the main body 1 is provided first. The upper part of the cylindrical body 1 on which the cord 2 wound up outwards is arranged is contracted to a considerable reduction in diameter, thus providing a portion 3 which is highly inclined inward.

To accommodate this new form of mouth, the lateral outer edges of the cord 2 are held in vertical alignment with the lateral outer wall of the cylindrical body 1 of the can for easy removal. A possible metallic lid 4 is attached to the mouth of the can and when the sealing gasket 5 is placed on top of the cord 2, the inner surface of the flange or skirt 6 contacts the lateral outer wall of the cylindrical body 1 of the can. Retained so that it can be unintentionally released or undesired when the jammer is placed in a carton, transferred, improperly handled, or juxtaposed during operation on the production line. You can eliminate the possibility that no release will occur.

Without the use of mechanical holding means or the use of bends, screws, nippers, etc.
This metallic lid, which is closed only by the action of the vacuum formed inside the stuffing body, has a bowl-shaped recess 7 formed in the center panel, and an escape hole 7a is arranged in the center of the recess. It is set up. This escape hole 7a has the same characteristics as the seal gasket, and is closed by a removable seal 8 formed of a resin material having the form described in the above-mentioned patent application of the present inventor. This removable seal, when removed during the initial opening of the packing,
The escape hole 7a is released and the vacuum formed inside the packing is broken, so that the user can remove the lid without the need to use a tool. However,
This point does not form part of the present invention as described above.

According to the invention, this new formation of the mouth of the can obtained by the manufacturing method in question, when mounted on a flange or skirt 6 with a small cord 6a at its lower end, allows the cylindrical body 1 of the can to be mounted. The lid can be placed in the mouth of the can so as to be in close contact with the outer wall of the side of the can, thus causing the lid to be caught by each other when the cans are arranged side by side, and when the can is shaken. It is possible to prevent the formation of an excessive protruding portion that may cause the lid to be opened unexpectedly and damage the packing body.

Another important feature of the present invention is that, according to this novel form, obtained by the novel method, it is not normally protected by sanitary varnishes and therefore the upper end of the cylindrical body which is subject to oxidative action. The cutting edge 2a is located outside the can and is not in contact with the contents of the filling body.
Furthermore, by preventing the lithographic paint on the outer wall of the cylindrical body 1 of the can from coming into contact with the inside of the can when the cord 2 wound outwards is retracted inward, the toxicity of the paint is reduced. The structure is such that it is possible to avoid shifting to a filled product.

The lid of the can is fully fitted and the cutting edge is fully protected against oxidation which would be accelerated by the significant acidity of the product when the cutting edge is inside the packing. However, the function and effect of the present invention that can prevent the portion of the can to which the lithographic paint is applied from coming into contact with the contents of the stuffing body and can eliminate the formation of a sharp burr are shown in FIG.
And, it cannot be obtained by a conventionally known method as exemplified in FIG. 6 for comparison.

As shown in FIG. 5, in this conventional configuration,
The cord 9 is simply rolled up outwards leaving a cutting edge 9a on the outside of the body of the can and the distance from the outer side wall of the cylindrical body 1 to the flange or skirt 6 of the metallic lid 4 is too large. Thus, when the packing bodies are arranged side by side, they cause contact and friction between the flanges or skirts of the lid, and the cans are packed in the carton box on the production line and shaken during transfer. , The lids may come into contact with each other and open.

In the case of the prior art shown in FIG. 6 for comparison, this known form of the cord 10 is simply rolled up inward and the flange or skirt 6 of the easily removable metal lid 4 is The cutting edge 11, which is kept in complete contact with the outer wall of the cylindrical body 1 and which is not protected by sanitary varnish, is located inside the can so that it is easily oxidised and the contents of the filling body are A portion 12 of the cord, which is then subjected to harmful contact with the lithograph paint that normally protects the outer surface of the cylindrical body of the can, is placed inside the packing body to Placed in contact, transferring the toxicity of the paint to the contents.

[0023]

The novel can manufacturing method of the present invention solves all the problems of the above-mentioned prior art while keeping the cost of the packing body as it is, and is completely airtight and safe so that no foreign matter enters. Vacuum sealing with the same conditions and effects as obtained when sealing glass cups by simple operation or by ensuring the integrity of the contents against contamination by preventing the transfer of oxidation and toxicity. The mouth of the can can be provided in a sufficient form so that the easily removable metal lid can be received in a completely airtight and safe condition. Furthermore, according to the present invention, it is possible to provide safety in which damage to the hand of a worker who operates or handles the packing body is completely prevented, and even after being opened at the time of first use. The same metal lid can be reused in its entirety as a hygienic lid to protect the contents and can be reused repeatedly.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional side view showing the top of a can having a mouth formed by the novel method and having an easily removable metallic lid of the type described above applied and placed in the closed position. Is.

FIG. 2 is a schematic cross-sectional side view of an easily removable metallic lid that has already been opened and the stuffing is open.

FIG. 3 is a schematic cross-sectional side view showing a metallic lid applied as a sanitary protection lid.

FIG. 4 is a partially enlarged detail view showing an aspect of forming a mouth of a can according to the novel method.

FIG. 5 is a partial detail showing, for comparison, a first conventional aspect of forming an upper cord of a can that is insufficient to properly apply a metal lid that is easily removable by vacuum sealing. It is a figure.

FIG. 6 is a partial detail showing, for comparison, a second conventional aspect of forming an upper cord of a can that is insufficient to fully apply a metal lid that can be easily removed by vacuum sealing. It is a figure.

[Explanation of symbols]

 1 Cylindrical body 2 Cord 3 Upper part 4 Metal lid 5 Seal gasket 6 Flange or skirt

Claims (3)

[Claims] 1. A can opening formed from a tin-plated sheet and formed from a cylindrical body and a bottom wall attached by bending is provided with an escape hole having a removable seal plug body. A food product that is formed into a shape that receives an easily removable metallic lid and that is closed by a vacuum action by the lid, and that is equipped with a vacuum closure device such as an easily foldable metallic lid that is easily removable. In a stuffed can,
A cord wound outside is placed on the upper end of the cylindrical body of the can, and a contracted portion with a significantly reduced diameter is formed on the upper end of the cylindrical body where the cord wound outside is placed. Then, by inclining this portion inwardly, the lateral outer edge of the cord is vertically aligned with the outer surface of the side wall of the cylindrical main body of the can. 2. A flange or skirt of a metal lid that is easily removable contacts the inner surface of the flange or skirt with the outer surface of the side wall of the cylindrical body of the can when disposed and held closed. The food-stuffed can according to claim 1, which is held in a state. 3. A sealing gasket that does not fold the closure of a tin-plated sheet can formed by a cylindrical body whose bottom end is conventionally closed by a bottom wall attached by bending. A food-stuffed can according to claim 1, characterized in that it is provided by an easily removable metallic lid, the holding and airtightness of which is provided by the action of a vacuum formed inside the can. .